Device for mixing amalgam for tooth fillings and stoppings



July 17, 1928.

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Mnmarzdmlj Patented July 17, 192s.

UNIT-isov sTAi'EsKWPATENT oFFICE.

VALDEMAR WILMING, 0F COPENHAGEN,FDENMARK, ASSIGNOB T0 GNNAR KOEFOED,

'.OF COPENHAGEN, DENMARK.

DEVICE FOR MIXING AMALGAM FOR TOOTH FILLINGS AND STOIPINGS..

Application iled March 16, `1927,Seria1.No. 175,881', and in Germany March. 17,` 1926.

This invention relates to a device for mixing the amalgam for tooth fillings or stoppings. Hitherto, this mixing was effected by rubbing together vthe metal powder and the mercury in a mortar, an operation which is very tedious and requires about` vten minutes. Machines for mixing the amalgam have 'already been proposed, which were adapted to be driven b the flexible shaft of a dental drilling mac ine or the like, but the constructions suggested vrequirea considerable amount of power or are heav and unwieldy, whereas such a device shou d be capable of being conveniently held in the hand, and should not require any appreciable power for its movement.

According to the `present invention oscillations are imparted to a pot by a rod connected thereto and to a transverse shaft, which rod carries at its lower end a body open at the bottom which is oscillated in such al manner by a pin eccentrically con-- nected with Va rotary shaft and engaging with the body with some freedom of movement, that the pin is capable of producing the movement of the pot in jerks.

The device according to lthe invention isi illustrated in the accompanying drawing, wherein Figure 1 shows an external view, partly in section. v

Figure 2 shows a partial view of the device turned through 90 relatively to Figure 1.

Figure 3 shows struction, and v Figure 4. shows a4 detail of Figure 3.

a is a horn pot having a screwed on cover b. Into the pot is screwed or cemented Ya rod c which is rigidly connected to a transverse shaft d. This shaft is mounted in a box e of which the cover is provided with a longitudinal recess extending transversely to the shaft cl in order to permit of an oscillatory movement of the rod c and thus of the pot a.

The rod extends downwardly into a trough-shaped body f which is open atthe bottom. With this engages a pin g mounted eccentrically on a disc l1.. The parts f, g

a .modified form of conand hare enclosed in ka box vl onvwhich` is screwed the box e by means of aange c.

The disc h isv rigidly connected tola shaft Z which is Vpassed through the hollow" hand Y piece m, this hand piece being screwed to the box z'. y Y

Within the hollow extension n of the hand piece m the shaft Z is provided with a driving member o adapted to be connected to aflexible shaft, for example, of a drilling machine. A .f

The method of imparting an oscillatory movement to the pot a is heieinbefore described only by way of example. It may be modified Y in various ways according to the driving means which are available. For

example, Figures 3 and 4 show aforml of construction in which thediiving shaft for the pot is arranged horizontally and the. rod

c is formedas a fork with which engages said rod and provided with a longitudinalV groove, and a pin adapted to rotate in the said groove with some freedom of movement and thereby rocking the pot in jerks,

2. In a device for mixing amalgam for tooth fillings and stoppin gs, apot for receiving theamalgam components, a rod integral with the said pot and carrying a transverse shaft swingingly journaled in a support,.a body integral with the end of the said rod and provided with a rlongitudinal groove, a pin adapted to rotate in the said groove with some freedom of movementfand thereby rocking the pot in jerks, a hollow handle connected with the said support, afsha-ft rotatable'iii the said handle and eccentrically connected with the said pin, and means for connecting the said rotatable shaft with the sha-ft of a dent-al engine. In testimony whereof vaLD. wiLMiNG.

I affix my signature.

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